JP2005133534A - Weed-proofing sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve adhesion and weed-proofing effect of a weed-proofing sheet and broaden an execution coverage to a markedly uneven foundation site. <P>SOLUTION: (1) The weed-proofing sheet composed mostly of asphalt to be adhered to cover a ground surface such as an interface crevice between a pavement material and the other, includes a substrate non-woven fabric layer across the full width and a weed-proofing non-woven fabric layer in at least a center portion of the width direction. (2) The weed-proofing sheet composed mostly of asphalt to be adhered to cover a ground surface such as an interface crevice between a pavement material and the other, includes a weed-proofing non-woven fabric layer across the full width. (3) As to (1) or (2), the substrate non-woven fabric layer or the weed-proofing non-woven fabric layer across the full width is placed closer to the surface side. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a weedproof sheet used for weeds that grow on interfacial gaps between pavement and concrete blocks, or cracks in pavement materials.

  The construction method of covering the interfacial gap by sticking (adhering) with a sheet-like material has been around for a long time. And this sheet | seat has a thing with asphalt which has a nonwoven fabric layer in the whole surface (full width) as a main material, and a thing without a nonwoven fabric layer. The construction method in the former case is roughly divided into the following three. (B) This is called the torch method. After the primer is applied to the road surface, the adhesive surface of the sheet is melted and pasted with a gas burner. Paste the sheet on top. (C) This is called a self-adhesion method, and is bonded by pressure using the adhesive force of the sheet itself. As the above-mentioned herbicidal sheet, those having a thickness of about 3 mm are generally used.

These technologies have the following disadvantages. (A) In order to secure sufficient adhesive strength and to block light from entering from “floating” due to imperfect adhesion, the asphalt layer needs to be sufficiently meshed with the unevenness of the road surface. For this purpose, the thicker the asphalt layer is, the more advantageous it is, but it is preferable that the thickness of the sheet is small because it is a step difference from the road surface. In view of cost, a sheet that is as thin as possible is desired. (B) Since the nonwoven fabric included in the conventional sheet is mainly intended for the strength and shape stability of the sheet, it has low herbicidal properties against “chigaya” and the like having a strong germination penetration force. The material of “nonwoven fabric” is generally mostly polyester.
Japanese Patent Application No. 10-106761

In order to solve the above disadvantages, the following is a problem. (B) Improves the meshing ability to the substrate with large irregularities, and improves the adhesion and eliminates light penetration from the ear part due to “floating of the sheet adhesion part”, thereby eliminating the growth of germination. (B) Ensuring germination penetration resistance in the sheet itself.

  Claim 1 equivalent. It is a herbicidal sheet mainly composed of asphalt that covers and covers the ground part such as interfacial gaps between paving materials and other objects, and the base nonwoven fabric layer covering the entire width and at least the central part in the width direction It is set as the weed prevention sheet | seat characterized by having a nonwoven fabric layer.

  Claim 2 equivalent. It is a herbicidal sheet mainly composed of asphalt that covers and covers the ground surface part such as interfacial gaps between paving materials and other objects, and has a herbicidal nonwoven layer over its entire width. .

Claim 3 equivalent. A base nonwoven fabric layer is used for the first aspect, and a weedproof nonwoven fabric layer is used for the second aspect, with the weedproof sheet brought close to the surface side.

  Describe the definition of words and materials. The “base non-woven fabric layer” is provided for the entire sheet (full width) and is arranged for “securing form stability and tensile strength” of the sheet. For this reason, “high-density basis weight” for the purpose of the herbicidal function is basically unnecessary, so that “low density” is used for all, and there is no high density. In addition, asphalt impregnation is low when the density is high, and there is a situation that is not preferable depending on the purpose of simply waterproofing. “Weight density” refers to the number of grams of fiber per volume of the nonwoven fabric, and “weight per unit area” refers to the number of grams of fiber per area. Depending on the purpose of use, even with the same basis weight, the thickness is compressed by a method such as pressing to increase the density.

“Weedproof non-woven fabric layer” is used to prevent chigaya, reeds, reeds, etc., which have a hard bud tip and strong penetration (1 kg or less per piece according to the previous literature). It is suitable to use those having a basis weight density of 0.4 gram / cubic centimeter or more. As an example of a product, there is an ACSTER mantle manufactured by Toray Industries, Inc., which is equivalent to or better than this product. Various thicknesses of 0.4 to 0.6 mm are provided. The above-mentioned “base nonwoven fabric layer” is completely different in purpose, quality and economy.

In general, the “sheet with asphalt as a main material” is a mixture of fine chips of synthetic resin (rubber) with asphalt as a main component. In addition, fine sand is generally provided on the surface from the benefit of use, and release paper or a film that is melted by torch heating is generally provided on the adhesive surface side. In the present specification, “adhesion”, “adhesion”, and “adhesion” may be used as synonyms.

  About claim 1. By adding the “weedproof nonwoven fabric layer”, the weedproof sheet itself has a weedproof function even for weeds with strong penetrating power, and no separate measures for penetrating are required. For this reason, construction labor is reduced.

Regarding claim 2. (A) In this case, the “weedproof nonwoven fabric layer” has both the purpose and function of the “substrate nonwoven fabric layer”, and thus the configuration is simple. In addition, as described above, a separate measure against penetration is not necessary. (B) In addition, it is advantageous for surface construction on the spot where sprouting is scattered on a wide surface, not a linear interface gap.

About claim 3. When comparing the present invention with a conventional sheet having the same thickness (the nonwoven fabric layer is in the center of the thickness), the present invention reduces the amount of asphalt layer on the upper side of the nonwoven fabric as much as possible, thereby eliminating waste. The thickness of the asphalt layer on the bonding surface is increased. This means that (a) the meshing property with the unevenness of the base is increased and the adhesion effect is increased. (B) The absence of “floating” on the adhesive surface eliminates light intrusion from the ear, and suppresses the growth of germination and prevents protrusion from the ear. (C) In view of the adaptability of the underlying unevenness, the overall thickness can be reduced compared to the conventional sheet, so the cost is low. (D) Further, since the level difference between the road surface and the seat surface can be reduced, walking trouble is reduced. (E) It becomes easy to cope with a site with severe irregularities, which could not be expected with the conventional sheet. (F) Increasing the degree of adhesion eliminates the intrusion of rainwater, etc., and reduces hydration to the roots. In addition, separation due to freezing of invading water is reduced.

  Hereinafter, a description will be given with reference to the drawings.

  FIG. 1 shows an example of claim 3. FIG. A shows an overall image of the construction site, and B and C are the conventional type of the A type herbicidal sheet 1 and those of the present invention. These are cases where only the base nonwoven fabric layer 7 is provided, and although it depends on the type of weeds, basically it has no herbicidal function and no role and covers the entire interface to eliminate the ingress of light and rain water. This ensures the herbicidal effect. FIG. B shows a conventionally used nonwoven fabric layer 7 at the center of the overall thickness. For this reason, since there are few asphalt layers under the nonwoven fabric layer for adapting to the unevenness | corrugation of a foundation | substrate, the adhesive effect is low in the aging foundation | substrate with intense unevenness | corrugation, and the "floating" of an adhesive surface tends to arise.

On the other hand, since the non-woven fabric layer is closer to the upper side in FIG. C of the invention, the asphalt layer effective for adhesion is large even with the same overall thickness, and therefore the adaptability to the unevenness of the foundation is remarkably high. If B and C have the same overall thickness and the nonwoven fabric layer has the same thickness, the effective thickness S of the asphalt layer 6 meshing with the unevenness is twice that of B, so that the adhesive action is greatly improved. In addition, the “floating of poor adhesion” due to the unevenness of the base is eliminated, and the protrusion growth from the ear due to the penetration of light is reduced.

  2, 3 and 4 show examples of the invention outside the scope of claims. See FIG. 2D. In the central part of the covering sheet 10 made of non-woven fabric, a separate sprout-preventing sheet 2 made of non-woven fabric is integrated, generally in a roll shape with a length of about 10 m, and with a width of about 15-20 cm. is there. As a method of integration, the strength of the integration is not an important problem since it is to improve the herbicidal function by sewing, bonding, welding, etc. and making it two layers double. In addition, the lower bud-preventing sheet 2 may be positioned on the upper side, but in this case, the two layers are preferably integrated completely. It is not good to peel off or get caught by a pedestrian. In addition, although the material of both sheets may be things other than a nonwoven fabric, the sprout stopping sheet 2 shall have a weedproof function with respect to a chigaya etc. at least. In addition, it should have good stretchability and flexibility. Also, the upper layer and the lower layer should have a color and thickness that do not allow light to pass through in order to suppress the growth of germination. In particular, the upper layer sheet is preferably coated with the surface to be easy to walk.

  See E in FIG. Adhesives 12 are provided at both ends of the two-layer type grass protection sheet 9. The material of the adhesive 12 is not particularly limited, but is adapted to the underlying concrete or asphalt pavement. It shall also adhere to non-woven fabrics. There are those that are heated and bonded, and those that are self-adhered at room temperature, but any one that has a necessary and sufficient effect may be used.

  See F in FIG. In this method, the adhesive material 12 is applied to the base 17 and the two-layer type herbicidal sheet 9 is pressure-bonded thereto. In both E and F, the width of the bonding portion does not need to cover the entire two-layer type weed-proof sheet 9. As described above, the interface gap 8 may be enlarged due to an earthquake, etc., so that the pulling force of the weedproof sheet by this external force is one point and the grassproof function does not deteriorate, it is a bridge bonded at both ends, It is necessary to keep a large allowable range of the herbicidal sheet to follow the elongation deformation. By increasing the thickness of the adhesive 12, there is a feature that can be applied to a site with severe irregularities.

  See FIG. The both ends of the sheet are closely bonded to the base 17. The material of the P-type weedproof sheet 15 is not limited to a non-woven fabric, and any material having a weedproof function may be used. Further, the entire width of the P-type grass prevention sheet 15 may be covered with the adhesive 12. A plurality of holes 16 are provided at both ends of the P-type grass prevention sheet 15, and adhesion to the base is enhanced through the holes 16. The hole 16 serves to assist in tightly and closely meshing with the base 17 through the adhesive 12. A plurality of holes may be arranged at different levels. Further, as another method of the auxiliary means, it is preferable that the end portion is provided with unevenness and bending so as to be firmly attached by meshing with the adhesive. The feature of this method is that reliable bonding is possible even if the material and properties of the P-type weed protection sheet 15 are not compatible with the adhesive. In addition, it is easy to carry out even on sites with severe irregularities.

  See FIG. A sprout stopping sheet 2 made of a nonwoven fabric is placed on the interfacial gap 8 and covered with a coating film seal 18 thereon. The material of the coating film seal 18 is a viscous liquid that is applied to the underlying concrete or asphalt and has good adhesion. Moreover, it should have a certain degree of elasticity after curing, and should not break due to vibration or deformation of the interface gap 8. It shall also be durable against sunlight, rain and temperature changes. An example of a product that can be used in the present invention is a “urethane-based coating film waterproofing material”.

  See FIG. I, J, K, and L diagrams corresponding to claim 1. See G and H for claim 2.

  See Figure I. The base nonwoven fabric layer 7 and the herbicidal nonwoven fabric layer 19 are arranged at the center of the overall thickness. Since the weedproof nonwoven fabric layer 19 corresponds to the interfacial gap where weeds are concentrated and grown, only the central portion in the width direction is used, and the width may be about 5 to 8 centimeters. The positional relationship between the base nonwoven fabric layer 7 and the weedproof nonwoven fabric layer 19 may be reversed upside down.

  See figure J. Although it is the same as that of FIG. I, the weedproof nonwoven fabric layer 19 is placed on the lower surface of the entire thickness. In this case, the central portion does not adapt to the unevenness of the base, but the overall width is set so that the necessary sticking force can be obtained as a whole.

  See K and L diagrams. The base nonwoven fabric layer 7 is placed on the front side, and the herbicidal nonwoven fabric layer is placed inside or on the bottom surface of the thickness. K, L, and H also correspond to claim 3. In the type shown in FIG. 5, fine sand and coloring are provided on the surface side, and release paper and a hot melt film are provided on the lower adhesive surface.

  (B) It can be used on many sites such as roads, sidewalks, parking lots, airport runways, waterways and the interface between top and bottom concrete, and poolside. (B) In addition, the conventional method is not suitable for construction on aged and uneven sidewalk surface because there are many poor adhesions and a reliable herbicidal effect is not expected. However, according to the present invention, since the allowable range of unevenness is expanded, the target range of the site to be constructed is expanded.

Example 1. A is a perspective view showing a construction situation. B shows the thickness structure of the conventionally used weedproof sheet. C is sectional drawing which shows the thickness structure of the weedproof sheet of this invention. Example 2. It is sectional drawing which shows the improvement of the weedproof sheet which consists of a nonwoven fabric. Example 3. It is the perspective view and sectional drawing of the weed prevention sheet which provided the adhesion auxiliary | assistant part in the both ends. Example 4. It is a section lineblock diagram of a paint film type herbicidal seal. Example 5. It is sectional drawing which shows the various structural types of a sheet | seat.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 A type weed prevention sheet 2 Sprout sheet 3 Pavement 4 Concrete block 5 Sand grain layer 6 Asphalt layer 7 Substrate nonwoven fabric layer 8 Interfacial gap 9 Two-layer type weed prevention sheet S Adhesive effective thickness 10 Cover sheet 12 Adhesive 13 Release sheet 14 Coating 15 P-type herbicidal sheet 16 Hole 17 Base 18 Coating film seal 19 Herbicidal nonwoven layer

Claims (3)

It is a herbicidal sheet mainly composed of asphalt that covers and covers the ground part such as interfacial gaps between paving materials and other objects, and the base nonwoven fabric layer covering the entire width and at least the central part in the width direction A weedproof sheet characterized by having a non-woven fabric layer. A herbicidal sheet mainly composed of asphalt that covers and covers a ground surface part such as an interfacial gap between a paving material and another object, and has a herbicidal nonwoven fabric layer over its entire width. A weedproof sheet in which the base nonwoven fabric layer is brought close to the surface side of claim 1 and the weedproof nonwoven fabric layer is brought close to the surface side of claim 2.

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